code: def _preprocess_domain_constraints(
      domain_constraints, constraint_prefix
  ):
      """Preprocesses domain constraints."""
      if domain_constraints is None:
          return domain_constraints
      for idx, var_dict in enumerate(domain_constraints):
          if not "name" in var_dict.keys():
              var_dict["name"] = "%s%02d" % (constraint_prefix, idx)
      return domain_constraints
  
imports: from __future__ import print_function
  from argparse import Namespace
  from copy import deepcopy
  import numpy
  from warnings import warn
  from .None import domains
  from ..parse.config_parser import config_parser
  from ..utils.general_utils import flatten_list_of_objects_and_iterables, get_original_order_from_reordered_list, transpose_list_of_lists
  from ..utils.oper_utils import random_sample_from_euclidean_domain, random_sample_from_discrete_euclidean_domain, random_sample_from_integral_domain, random_sample_from_prod_discrete_domain
label_desc: Use image node_id 3 for calling a global function with example usage: _preprocess_domain_constraints(domain_constraints, constraint_prefix) and returns: domain_constraints, domain_constraints